S390: Optimize memchr, rawmemchr and wmemchr.

This patch provides optimized versions of memchr, rawmemchr and wmemchr with the
z13 vector instructions.

ChangeLog:

	* sysdeps/s390/multiarch/memchr-vx.S: New File.
	* sysdeps/s390/multiarch/memchr.c: Likewise.
	* sysdeps/s390/multiarch/rawmemchr-c.c: Likewise.
	* sysdeps/s390/multiarch/rawmemchr-vx.S: Likewise.
	* sysdeps/s390/multiarch/rawmemchr.c: Likewise.
	* sysdeps/s390/multiarch/wmemchr-c.c: Likewise.
	* sysdeps/s390/multiarch/wmemchr-vx.S: Likewise.
	* sysdeps/s390/multiarch/wmemchr.c: Likewise.
	* sysdeps/s390/s390-32/multiarch/memchr.c: Likewise.
	* sysdeps/s390/s390-64/multiarch/memchr.c: Likewise.
	* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add memchr, wmemchr
	and rawmemchr functions.
	* sysdeps/s390/multiarch/ifunc-impl-list-common.c
	(__libc_ifunc_impl_list_common): Add ifunc test for memchr, rawmemchr
	and wmemchr.
	* wcsmbs/wmemchr.c: Use WMEMCHR if defined.
	* string/test-memchr.c: Add wmemchr support.
	* wcsmbs/test-wmemchr.c: New File.
	* wcsmbs/Makefile (strop-tests): Add wmemchr.
	* benchtests/bench-memchr.c: Add wmemchr support.
	* benchtests/bench-wmemchr.c: New File.
	* benchtests/Makefile (wcsmbs-bench): wmemchr.

1 files changed, 34 insertions, 0 deletions

diff --git a/sysdeps/s390/multiarch/rawmemchr-c.c b/sysdeps/s390/multiarch/rawmemchr-c.c
new file mode 100644
index 0000000000..a85e83f8c0
--- /dev/null
+++ b/sysdeps/s390/multiarch/rawmemchr-c.c
@@ -0,0 +1,34 @@
+/* Default rawmemchr implementation for S/390.
+   Copyright (C) 2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
+# include <string.h>
+
+# define RAWMEMCHR  __rawmemchr_c
+# undef weak_alias
+# define weak_alias(a, b)
+# ifdef SHARED
+#  undef libc_hidden_def
+#  define libc_hidden_def(name)				\
+     __hidden_ver1 (__rawmemchr_c, __GI___rawmemchr, __rawmemchr_c);
+# endif /* SHARED */
+
+extern __typeof (rawmemchr) __rawmemchr_c attribute_hidden;
+
+# include <string/rawmemchr.c>
+#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */